Abstract: A binder lock mechanism includes a manually adjustable locking bar and co-operative locking-hook parts. Pair-wise mutually overlappable locking-hook parts are connected with and project from a respective binder end half, and are situated at mutual distances from each other. The binder end halves are connected by an intermediate pivot joint. The pair-wise mutually overlappable locking-hook parts present openings adapted to receive a respective lock lever connected with the locking bar and have a respective lock lever permanently received on a common binder end half in a mating opening in an assembled state. The lock levers are arranged at a tip portion and at a waved part, respectively, of the locking bar in such a way that they are situated on a common line through the bar, which is retained by a counter-directed resilient tongue situated on the locking bar and a stopper and co-operatable counter-stoppers situated on the binder end.

Abstract: An improved assembly (12) for use in a ringbinder (10) to hold sheets (P) paper having holes (H) punched in them. A prong bar assembly (16) includes first and second spaced apart and aligned U-shaped members (18a, 18b) attached to respective end pieces (L1, L2) forming outer leaves of the binder. These members have respective upper and lower flanges (40u, 40l) to strengthen the members and make the ringbinder sturdier. First and second swivel locks (26a, 28a) are located at each end of the prong bar assembly. Each lock includes a pair of L-shaped links (26b, 26c, 28b, 28c) having one end pivotally attached to one of the U=-shaped members, with the other ends (46) being pivotally connected together. The swivel locks are movable from a prong bar assembly locking position to an unlocking position, this enabling the U-shaped members to move relative to each other. A pair of curved sheet holding prongs (22a, 22b) each have one end (34) stakingly attached to the respective U-shaped members.

Abstract: An economical lightweight looseleaf binder combines the functionality of a standard ring binder with easy-to-use characteristics of report covers. The cover is folded to define front and back panels as well as a spine portion, and additionally includes a crease at the longitudinal center line of the two ring assemblies which are both secured to the back panel. The ring assemblies include a series of hooks having complementary notched profiles which firmly engage one another when closed, yet may be easily disengaged through flexure of the cover. In one construction, the binder comprises a pressboard cover to which is attached a pair of plastic ring assemblies. The hooks are configured to permit filler sheets to lie flat and to facilitate transfer of sheets from one side to the other.

Abstract: an ordering means for document files or the like comprises a base plate which is provided with at least two fixed ordering pins. At least one movable closure bow can be brought into closure contact with the ordering pins. Possibly a holder-down is provided which is adapted to be clamped with respect to the ordering pins. A locking member displaceable with respect to the base plate serves to adjust the closure bow or bows and on the base plate guide means are provided for guiding the locking member. The locking member is provided with the guide slots or guide grooves via which the locking member is in engagement with each closure bow so that on displacement of the locking member the respective closure bow can be opened or closed.

Abstract: A binder mechanism having two longitudinal bars on which the page holding prongs are mounted. The bars are interconnected by two rectangular movable hinge members situated proximate opposite ends of the bars. The hinge members which have two right angle sections interconnected by a piano hinge are rotatably connected to the bars and define a rectangular box-shaped structure with the bars when the binder is in the locked position. Both hinge members and bars have a thin rectangular cross-section, the long dimension of which is vertically oriented when the hinge members and the bars are in the locked position. The hinge members pivot about pins which interconnect the hinge members to the bars to rotate to an open position with the piano hinge rotated 90.degree.. One hinge member then rotates about the piano hinge to open the binder so that the longitudinal bars are in a horizontal position and the prongs are vertically disposed. In this position, pages can be removed and inserted.

Abstract: A linking arms mechanism for a prong type loose-leaf paper binder having spacer bars with recessed portions within which curved spaced prongs are fixed and integral raised shear stops are formed which cooperate with a hinge assembly.

Abstract: A looseleaf binder mechanism having a pin-and-slot mounted shiftable latching slide provided with novel positive detenting means comprising an elastomeric washer mounted on the pin and cooperable with a protuberance formed on the latching member intermediate the ends of the slot, to thereby hold the latching member detented in its respective shifted end positions.